Cut-off mechanism



J. S. HAASE AND S. M. LANGSTON.

CUT-OFF MECHANISM.

APPLICATION FILED AUG.22. 1919.

1,359,058. Patented Nov. 16, 1920.

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APPLICATION FILED AUG.22. I9I9.

4 SHEETSSHEET 2.

Ticizh QRMM eooeo 1 n we wfow J. S. HAASE AND S. M. LANGSTON. CUT-OFF MECHANISM.

APPLICATION FILED AUG.Z2, I919. 1,359,058. @MM Gd NOVa 16,, 1920,

4 SHEETSSHEET 3.

Iv- N J. S. HAASE AND S. M. LANGS TON. CUT-OFF MECHANISM.

APPLICATION FILED AUG.22, I919.

1,359,058. Patented Nov 16, 1920.

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4 SHEET 1919341 200420 5 wve Wfou- -Z,r- !/M1LZ4%- 4 "W {{M w 2 WHOM/W13 y UNITED STATES PATENT OFFICE.

JORGEN S. HAASE, OF CAMDEN, AND SAMUEL M. LANGSTON. OF WENONAH, NEW JERSEY, ASSIGNORS TO SAMUEL M. LANGSTON COMPANY, OF CAMDEN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

CUT-OFF MECHANISM.

Application filed Ang 22. 1919.

'1 'o a whom it may concern.

Be it known that we. J ononx S. HAASE, a subject of Denmark, and a resident of Camden. in the county of Camden and State of New Jersey, and SAMUEL M. LANGSTUN, a citizen of the United States, and a resident of \Yenonah, in the county of Gloucester and State of New Jersey, have invented certain new and useful Improvements in Cut- ()ff'Mechanism, of which the following is a specification.

This invention relates to cut off mechanism particularly adapted for use with comparatively thick stiff sheet material, such as double faced corrugated paper. multiple ply board. or the like. and for use in conjunction with mechanism for delivering or advancing the material without interruption during the cutting operation. The invention relates to that type ofcut off mechanism in which the pair of co-acting knives or other cutters move back and forth along the line of travel of the material and cut the latter while traveling in one direction with the material. 0111' invention involves primarily the means for supporting. operating. and controllingmovements of the .cut-

ters. and the main object of'the invention is to provide a relative movement of the cutters about a pivotal center, which center has a bodily movement in the general direction of the lineof travel of the material, whereby an efficient cutting action is secured. rotary or swinging'movement utilized instead of reciprocating, and the desired relative speeds of the cutters and back and forth bodily travel is maintained.

In the accompanying drawings. there is illustrated one embodiment of our invention, altl'iough it will of course be understood that we do not wish to be limited to the specific construction illustrated except in so far as it is defined in the appended claims.

In these drawings:

Figure 1 is an end view of the cut off mechanism.

Fig. 2 is a front view.

Fig. 3 is a plan view.

Figs-4 to 8 inclusive are diagrammatic views. showing the cutters and operating parts: Fig. 4 illustrating the normal or rest Specification of Letters Patent.

Patented Nov. 16, 1920.

Serial No. 319.184.

position; Fig. 5'the position at the beginning of the cut; Fig. 6 the position at the end of the cut; Fig. 7 the position after one half revolution from the restposition; and F ig. S midway of the return to rest position; and

Fig. 9 is a sectional detail of the cutters.

The machine illustrated, includes a suitable base 10. to which is pivoted a knife or cutter carrier which. as illustrated, includes a pair of upstanding parallel arms 11 connected by a transverse beam or bar 12 to which the knife or cutter 13 is secured. The arms 11 are of such length that they may swing through a comparatively small angle but give the desired length of substantially horizontal movement to the cutter 13. The normal or rest position of the arms is slightly to one side of the vertical, and the movement of the arms carries them to approximately the same distance at the other side of vertical. and by reason of the length of the arms and the. angle through which they swing. the path of movement of the cutter 13 is substantially horizontal. The arms are illustrated as being mounted at their lower ends upon a rock shaft 14 journaled in bearings 15 on the base 10 but it will of course beevident that any other suitable form of pivotal support might be provided.

Pivotally secured to the cutter carrier above described is a second cutter carrier. As illustrated, the arms 11 have portions 16 extending rearwardly at approximately the elevation of the cutter 13 and to these rearwardly extending portions are pivotally mounted a pair of arms 17 connected together by a transverse beam or bar 18 of the same general character as the bar or beam 12 and carrying a somewhat similar cutter 19. The pivotal connection between the arms 11 and 17 may be of any suitable character, as for instance, pivot bolts 20. The distance from these pivot bolts to the cutters 13 and 19 is approximately the same. and the cutters are of such character that as the arms swing in respect to each other. the cutters move past each other to shear the intervening material. I have shown the cutters 13 rigidly bolted to but removable from the means 12 and have shown the cutters 19 connected by adjusting bolts 21, whereby the cutters may be properly adjusted in re.- nect "to each other or removed for sharpeni-n or repair.

Tor operating the cutters. there is provided means for swinging the arms 11 back and forth to give the cutters 13 an approximately horizontal movement. The speed of travel of the cutters in one direction is. at the same speed as the rate of travel of the material to be cut. It is to be understood that the mechanism is particularly designed for use in connection with a machine which continuously delivers sheet material at a substantially constant speed. and the materail being comlmratively stiff. such for intance as double faced corrugated board. The delivery mechanism is not shown as obviously it forms no portion of our present invention. The speed of return movement of the cutter 13 is immaterial as is also such portions of the forward movement of the cutter as take place while the cutters are separated and the material is free to pass therebetween. As a preferred mechanism for swinging the arms 11 and cutter 13. there is provided a shaft 22 parallel to the pivots of the arms 11 and having eccentric connections to said arms. 'lhese connta-tions are illustrated as a pair of crank arms 23 keyed to the shaft 22 and connecting rods. 24 journaled on the crank pins :25. and to pivot pins or stub shafts 20 on the arms 11. These connecting rods are illustrated as being of adiustable length so that the normal rest position of the cutter 13 may be varied. complete revolution of the shaft 2; will swing the arms 11 and the cutter 13 back and forth through one complete cycle.

.\s the speed of travel of the cutter 13 during its back and forth movement varies. continuously. the operating mechanism for the cutter 19 is such that the cutting operzp tion takes place during that portion of the forward movement of the cutter 13 when it most nearly approxinmtes the speed of the material. The operating mechanism for the cutter 19 also insures the complete separation of the cutters to permit free passage of the material therebetwtwn during the complete return stroke of the cutter 13. This operating mechanism includes a guide which engages with the arm 11' while the latter is being positively carried along with the swinging arms 11. The preferred form of guide is a rotary cam engaging with a projection from th arm 17. .\s shown. each arm 17 is approxinmtely of hell crank form. that it includes a substantially horizontal portion carrying the cutters 19 and a depending portion 27 approximately at rightangles thereto. and approximately parallel to the main or body portions of the arms 11. The guiding or controlling means for the arm 17 is illustrated as including a shaft L8 journaled in suitable uprights or brackets 29 on the base 10 and carrying a pair of disks 30 having laterally facing cam grooves 31 receiving rollers or projections 3:2 on the depending ends .27 of'the arms 17.

The shaft 22 which is mounted on uprights or brackets 33 and the shaft 2* are parallel and are so connected that they make a complete revolution in the same time. The particular design of cam and cooperating parts is such that the shafts :22 and 28 must rotate in opposite directions and at the same speed. This is accomplished by inter-meshing gears 31 and 35 of the same pitch diameter on the two shafts. It will of course be evident that with other forms of cam and other relative proportions and positions of the parts. the two shafts might be rotated in the same direction to give the desired effect or might be rotated by variable speed connections. it only being important that the two shafts start from and return. to preiletermined relative positions which are preferably rest positions in the same time interval.

In order to clearly indicate the successive positions of the parts and the operation of the. guide 31. 1 have shown the parts dia grammatically in a plurality of positions in Figs. 4 to 8 inclusive. The parts at the beginning of a cycle of operations. are in what is preferably a rest position. and, are as illustrated in Fig. 4. It will be noted that the cam groove or guide 31 has a portion 31 substantially concentric with the axis of the shaft 28 and two approximately straight portions 31 and 31 approaching toward and diverging from said axis. and are along cords of the circle of the portion 31. The curved or concentric portion 31 extends along somewhat less than- 1911 and the portions 31" and 3 c are connected by a second concentric portion 31 close to the axis of the shaft and extending through about 90. These two concentric portions 31 and :31 in effect constitute stops. The cam or guide 31 is. indicated as a groove but of course either side of the groove might be omitted. if proper means he provided for holding the guided part against the other side.

With the parts in normal or rest position as shown in Fig. 4 the crank arm 23 is approximately at one dead center position and the arm 11 is drawn back to its limiting position toward the source of material to be cut. The roller 32 which forms the guided end of the arm 17 is at the beginning end of the concentric portion 31 of the guide or cam groove. theshaft 22 rotates clockwise and the shaft 28 rotates counter-clockwise. the parts move to and through the position indicated in Fig. at which point the cut of the material begins. As the arm 11 swings toward the. right from the position shown in Fig. 4 it carries with it the pivot pin 20 of the arm 17 but the lower or guided end 32 of the arm 17 is prevented from moving laterally at the same speed. Thus the bell crank arm 11' is forced to swing about its pivot and the upper cutter 19 swings down wardly to and past the cutter 13. It will be noted that the crank arm 23 and the connecting rod 2% are approaching normal to each other at the beginning of the cut. Thus at this period the arm 11 is moving at its highest rate of speed and the cutter 13 is moving at the same speed as the material, and the cutter 19 is also swung down at a corresponding high speed to sever the material. hen the crank arm and connecting rod are slightly past normal, as indicated in Fig. 6, the cutting operation has been completed. At this instant the guided end 32 of the arm 17 reaches the end of the curve 31 and enters the substantially straight portion 31*. It will be noted that the shaft 22 is so positioned in respect to the length of the bell crank arm portion 27 that the guided portion 31 is approximately horizontal at this instant and the guided portion 32 is caused to make a very rapid horizontal movement with a correspondingly rapid upward movement and separation of the cutters. This separation takes place before the arm 11 reaches the end of its stroke and thus the material may be passing through between the cutters during the slower movement of the arms 11 which takes place when the crank arms 23 are approaching their second dead center position shown in Fig. 7. It will be noted that in this position the guided portion 32 is comparatively close to the axis of the shaft 28 and thus a rotation of the shaft through a comparatively wide angle gives but slight if any movement to the guide 32. lVith the guide 32 held approximately stationary, any swinging of the arms 11 causes a relative movement of the cutters. \Vhen the arm has thus swung through its outward stroke and the shafts 22 and 28 have rotated through a half revolution, the cutters have been brought together, severed the material, and have been separated. During the return movement of the arms 11, they pass through the position indicated in Fig. 8 in which the guided portion 32 moves along the cam portion 31 and holds the cutters separated during the entire return movement. By the time the guided portions 32 of the arm 17 reach the end of the guided portion 31, the pivotal center of the arms 17 have also been moved laterally to a corresponding extent and there has been but comparatively slight relative movement of the cutters during the entire return stroke. With the cam illustrated, it is important that it rotate in the direction indicated, namely counter-clockwise, but with a crank arm and connecting rod or any other equivalent form of eccentric connection, the direction of rotation of the shaft 22 is immaterial.

Power may be applied to the machine through any of the moving parts, although it is preferably applied through the shaft 22 which is nearest to and most conveniently coupled up with the sheet and delivery mechanism so as to insure the proper relative speeds of the cutoff mechanism and the delivery mechanism.

In practice,.the cutoff mechanism is oper ated intermittently and is normally at rest with the parts in the position shown in Fig. 4. The material may freely pass between the two cutters until the desired length of sheet has been fed through and the mechanism then operates to start the cutoff mechanism and operate it through one cycle and back to the rest position. The control of the machine forms no portion of our present invention but it preferably operates some form of clutch which, when engages, will give one revolution and then release. The clutch may be controlled by the delivery machine or by a stop in the path of the advance end of the material being delivered. e have illustrated a sprocket wheel 36 on the shaft 22 and to which may be connected the main drive chain. In practice, the sprocket 36 is loose on the shaft 22 and is adapted to be connected thereto by some form of clutch which, as previously stated, will give one revolution and then release. Thus the sprocket 36 may rotate continuously and the shaft 22 and the cutoff mechanism operate intermittently at time intervals depending upon the rate of delivery of the material and the length of sections into which it is to be cut. Of course the sprocket 36 may be keyed to the shaft 22 and the intermittent clutch or other connection be placed farther back in the power transmission train.

Having thus described our invention what we claim as new and desire to secure by Letters Patent is:

1. A cutoff mechanism, including a cutter a cutter carrier mounted for swinging movement. back and forth to move the cutter in the general direction of the line of travel of the material to be cut, a second cutter, a cutter carrier therefor pivotally mounted on said first mentioned cutter carrier, and a rotatable member for effecting a relative movement of said cutter carriers to swing said cutters past each other during the swinging movement of the first. mentioned cutter carrier.

2. A cutoff mechanism, including a pivoted arm. a cutter carried thereby. a second arm pivoted to the first mentioned arm. a cutter carried by said second mentioned arm for cooperation with the first mentioned cutter to sever the material, and a member rotatable about a fixed axis for swinging said second mentioned arm in respect to the first mentioned arm during the swinging movement of the latter.

A cutoff mechanism, including a pivoted arm, a second arm pivoted to the first mentioned arm, a pair of cooperating cutters carried by said arms, and a member rotatable about a fixed axis for effecting the swinging movement of the second mentioned arm in respect to the first mentioned arm during the swinging of the latter.

4. A cutoff mechanism including apivoted arm, a second arm pivoted to the first mentioned arm, a pair of cooperating cutters carried by said arms, means for swinging said first mentioned arm, and a member rotatable about a fixed axis for effecting the swinging movement of the second mentioned arm in respect to the first mentioned arm during the swinging of the latter.

5. A cutoff mechanism including two members rotatable at the same speed in opposite directions, a pivoted knife carrier operatively connected to one member, and a second knife carrier pivoted to said first mentioned knife carrier and operati'vely connected to the other member.

6. A cutoff mechanism including two members rotatable at the same speed, a pivoted knife carrier operatively connected to one member, and a second knife carrier pivoted to said first mentioned knife carrier ind operatively connected to the other mem- 7 A cutoff mechanism including two members rotatablein opposite direction, a pivoted knife carrier operatively connected to one member, anda second knife carrier pivoted to said first mentioned knife carrier and'operatively connected to the other memher.

8. A cutoff mechanism including two rotatable members, a pivoted knife carrier operatively connected to one member, and a second knife carrier pivoted to said first mentioned knife carrier and operatively connected to the other member.

9. A cutoff mechanism including two rotatable members, a pivoted knife carrier, a second knife carrier pivoted to the first mentioned knife carrier, eccentric driving connections between one of said carriers and one ofsaid members, and cam connections between the other of said carriers and the other of said members.

10. A cutoff mechanism, including a pivoted .knife carrier, a second knife carrier ivoted to the first mentioned knife carrier, means forswin ing said first mentioned knife carrier bac and forth, and a rotatable 'cam having direct engagement with said second mentioned knife carrier.

11. A cutoff mechanism, including a pivoted knife carrier, means for swinging said carrier back and forth, a secondknife carnife carrier for controlling the relative movements of the knife carriers during the SWlIlglIlg movement of the first mentioned carrier.

13. A cutoff mechanism, including a substantlally vertical arm pivotally supported at its lower end and carrying a cutter at its upper end and presenting a lateral extens on, a bell crank arm pivoted to said extenslon and having a horizontal portion and 21 depending portion, a cutter carried by said horizontal portion for cooperating with said first mentioned cutter, means for swinging said first mentioned arm about its pivot, and means engaging with the depending end of the second mentioned arm for effecting a relative movement of said cutters during a swmglng movement of said first mentioned arm.

"-14. A cutoff mechanism, including a substantially vertical arm pivotally supported at its lower end and carrying a cutter at its upper end and presenting a lateral extension, a bell crank arm pivoted to said exten- Slon and having a horizontal portion and a depending portion, a eutter'carried by said horizontal portion for cooperating with said fir t mentloned cutter, means for swinging said first mentioned arm about its pivot and a rotatable member presenting a cam surface engaging with the depending end of the second mentioned arm for effectin a relatlv movement of said cutters uring a swinging movement of said first mentioned arm.

15. A cut off mechanism including a cutter ivotally supported to oscillate about a fixe center spaced from the path of movement of the material to be cut, and having a cutter movable back and forth alon an arczapproximately tangent to said pat a second cutter carrier pivotally connected to said first mentioned cutter carrier at a point spaced from said cutter in the general direction of the path of the material, and having a cutter for cooperatio ith th fi t tioned cutter, and movable up and down in respect to the first cutter along an arc approximately at right angles to said path, a crank shaft rotatable about a fixed axis, a link connecting said first mentioned cutter carrier and the crank f said crank shaft for oscillating the first mentioned cutter carrier,

and means for swinging said second menand said carriers for effecting the bodily l0 tloned cutter carrier during said movement movement and the swinging movement of of said first cutter carrier. said second mentioned carrier.

16. A cutoff mechanism, including a pair Signed at Camden, in the county of 0amof parallel shafts geared together for simulden and State of New Jersey, this 25th day taneous rotation in opposite directions, a pivof July, A. D. 1919.

oted cutter carrier, a second cutter carrier pivoted to the first mentioned carrier, and JORGEN S. HAASE. separate means for connecting said shafts SAML. M. LANGSTON. 

